Camera.



G. "1. TERWIEL.'

I CAMERA. APPLICATION FILED AUG.2I. 1917.

1,326,470. Patented Dc. 30,1919.

WITNESSES; I

GERARD J. TERWIEL, OF THE HAGUE, NETHERLANDS.

CAMERA.

' To all whom it may concern:

Be it known that I, GERARD J. TERWIEL, subject of the Kingdom of theNetherlands, residing at the city of The Hague, Kingdom of theNetherlands, have invented a new-and useful Improvement in Cameras, ofwhich the following is a specification.

Thisinvention relates to improvements in cameras which employ asensitized film carried by reels from which successive sections may beunrolled and exposed, then rerolled and removed for developing in theusual manner.

One of the objects of the present invention.

is to prevent double exposure of any section of the film. Another objectis to provide means whereby successive portions of the} film may beunrolled only a predetermined distance and then temporarily locked untilexposure has been made, thus avoiding a forming of blanks and theoverlapping of film sections when taking pictures. F urther objects willhereinafter appear.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanyin? drawings, in which igure 1 is a sideelevation of the camera showing the application of the invention. Fig. 2is an enlarged detail rear view'of the camera casing partly in sectionshowing the position of the locking pawls.

i Fig. 3 is a section on line 3-3 of Fig. 2. Fig. 4 is an enlargeddetail view partly in section, of the inner end ofthe wire operatedtrip.

Fig. 5 is a similar View of the opposite end of the trip.

Referring to the drawings in detail, A 111-- dicates the main housing-ofthe camera; 2

the removable back section; 3 the hinged front section; 4 the bellowsand 5 the lens, which in this instance is provided with a shutter and anadjustable diaphragm 0f. the usual construction. v

Mounted interior of the housing is a winding reel 6 and an unwindingreel 7. Turnably mounted on one of the sections supporting the unwindingreel is a ratchet wheel 8 and pivotally mounted on" a stud screw 9secured in the side of the casing is a locking pawl, in this instanceprovided with four arm extensions, such as indicated at 101l'12 and 13,respectively.

Also pivotally mountedon the side of the I Specification of Letterslatent.

Patented Dec. 30, 1919.

Application filed August 27, 1917. Serial No. 188,519.

casing is a second spring actuated pawl 14:,

which is provided for the purpose of engag-' ing the pawl extension 10and locking the same together with the remaining connected pawls, in apredetermined position, as will hereinafter be described.

Passing through the camera housing is a flexible tube 15 in which isslidably mounted a trip wire 16. The inner end of this wire isconnectedto a piston 17 which is slidably mounted in a cylinder 18 and normallyheld in the position shown in Fig, 4, by means of a spring 19. Theopposite end of the wire 16 .and the flexible housing 15' is extended toa push button 20 where the housing is secured and the wire 16 isconnected to amovable sleeve 21 through meansof a plunger 22 and a. pin23. A second flexible housing 24 is also connected to the push buttonwhich is provided for. the urpose of opening the shutter. The oppositeend of this housing is suitably secured to the shutter housing,

and awire 25 passing through the housing 24 is dlrectly connected ,withthe shutter to open same in the usual manner.

Formed in one edge of the film employed I is a series of perforations26. These perforations are so arranged and spaced a art that oneperforation will be brought into register with the pawl 18 every time anew film section has been moved into alinement with the lens of thecamera. The film will here be temporarily locked until exposure has beenmade, as the pawl 13 carrying a roller 13 will'drop through theregisterlng film opening and lock same againstmoveary pawl 14 and whenin engagement with I 106 same serves as a means for holding the pawls 12and 13 out of engagement with their respective coo erating parts.

In operation wit the film reel 7 inserted reel 6, it is only necessaryto turn the winding reel. by means of the key. 30 in the die rection ofthe arrow show'n until a film perfo.

and the free end secured to the winding.

ration 26 moves'into register with the roller and pawl 13. A pin 8secured on the outer face of the ratchet wheel 8 will at this pointengage the secondary pawl 1i and rock it a sufficient distance torelease it with relation to the pawl 10, thereby permitting the pawls 12and 13 to drop into engagement one with the ratchet wheel and the otherwith the film perforation. However, should the pin 8 trip the pawl 14:and release the lever 10 before the film perforation 26 reaches aposition opposite pawl 13, as when "the diameter of roll 7 decreaseswith the unwinding of the film, said pawl 13 will drop onto the film byreason of spring 19, and its roller 13 will ride on the film until theperforation, moves therebetween whereupon the pawl 13 will move thereinto apply the pawl 12 to the ratchet. Both the un' winding reel andthe'film is in this manner temporarily locked against movement and thefilm is in readiness for exposure. This is accomplished by pullingoutwardly on the movable sleeve section 21. The wires 16 and 25 are inthis manner simultaneously pulled inan outward direction thus causingthe shutter to be tripped and the respective pawls l()11-12 and 13 tobemoved from the dotted line, or locked position shown, to the full-linereleased position shown,

1 where pawl 10 is again engaged. by pawl 14 and locked to hold thepawls 1112 and 13 in released position. This position maintained until anew film section has been turned into position, as the secondary latch14 will not release the pawls until it is tripped bythe pin 8 Thistripping movement vdoes not take place until a complete new section offilm is moved into place and as the-pawls are held in raised and lockedposition during the movement of the new film section into position, itcan readily be seen that a double exposure of the film cannot take placebecause the push-button will be held in depressed position until thelatch 14 is trippedand the pawls released. The springs 19 and 20 will atthis time retract the wires 16 and '25 and permit the pistons 17 and 22to move back to 'normal position."

The pawl 12- therefore moves into engagement with the ratchet wheel 8while the pawl 13 carrying the roller drops into-the film perforationwhich happens to be inreg ister. Further turning movement of the filmbeyond a predetermined distance is therefore prevented, and formation ofblanks on the film is also Prevented,: as it is impossible to move a newfilm section into position;

until the presentfilm section has been exposed. Th1s can readily be seenwhen itis realized that the pawls 10-11--12 and 13 will remain in lockedposition until the' push-gutton is operated and the shutter is one. 1The attachment as a whole is simple in construction and so compactandsmall that it maybe installed or applied to practically any makecamera now employed or against the film if the perforation is out of reistry.

The unwinding reel should preferably be provided with two or. moreperforations for the reception of pins 7 carried by the ratchet wheel,this being preferably as a permanent lock is thereby formed between.

the" unwinding reel and the ratchet wheel as long as the reel remainswithin the camera.

The materials and finish of the several parts of the camera mayotherwise be such as the experience and judgment of the manufacturer maydictate.

Having thus described my invention what.

'oscillate the same and thereby swing the look from the reel and meansfor sliding the 2. A camera including a film-carrying reel, a lock armto engage the reel and hold itagainst movement when its film has moved apredetermined distance, a second arm fixedly related to the lock arm, acylindrical housing adjacent the second arm and f0IfIned with $8101., aplunger 'slidable in the housing and provided with a pair of pinsextending outwardly through the housing lot and straddling the secondarm to oscillate the same and thereby swing the lock arm from the reel,means for sliding the plunger in one direction, a coiled spring withinthe housing for pressing the plunger in the opposite direction, a thirdarm rigid with the aforesaid arms, a pawl engageable with the third armwhen the second arm is operated by said means to hold said thirdarmagainst the tension of the coiled spring, and means operable by the reelto release the third arm from the pawl.

3. A camera including a film-carrying reel having a ratchet and 'a trip,a pawl cooperating with the ratchet to lock the reel against movementwhen its film has moved a predetermined distance, an arm fixedly relatedto the pawl, a second pawl engage'able I with the arm for holdingthefirst pawl in-, operative, said second pawl being renderedinoperative by the tri to release the arm and first pawl, a second armalso rigidly related to the first pawl and arm for moving the latterinto engagement with said second pa wl, and for operating the secondarm;

4. A camera including a film-carrying reel having a ratchet and a trip,a pawl 006perating with the ratchet to lock the. reel against movementwhen its film has moved a predetermined distance, an arm fixedly relatedto the pawl,'a second awl engageable with the-arm for holding t efirst'pawl inoperative, said second pawl being rendered inoperative bythe trip to release the arm and first pawl, a' second arm also rigidlyrelated to the first pawl and arm for moving the latter into engagementwith said second pjswl, a third pawl fixedly related to the t pawl andnormally held spaced from p I J the film by the engagement of the secondpawl with the first arm, and adapted-when released to ride on the filmuntil a perforation in the latter registers therewith and. 20- then topass into the perforation for efi'ecting engagement of the first pawlwith the ratchet, and means for operating the second arm.

my hand in the presence of two subscribing witnesses.

GERARD J. TERWIEL! Witnesses: I

GEORGE D. PERRY,

BRADLEY L. 'W'ALLAoE.

In witness whereof I have hereunto set 25

